Trans-HFO-1234ze Isomer from Japan
The trans isomer of 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)-prop-1-ene (HFO-1234ze), a specific stereoisomer used in precision applications like specialty solvents. Classified under HTS 2903.59.10.10 as the named compound per Chapter 29 note (b) for mixtures of isomers. Its acyclic unsaturated fluorinated structure determines the tariff placement.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include stereochemical analysis (NMR/chromatography) to confirm trans isomer identity for specific classification
• Label containers clearly distinguishing trans from cis or mixed isomers to prevent reclassification
• Monitor for anti-dumping duties on fluorinated compounds from certain origins